[Docs] Rename docs_new/ to docs/ (#32123)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

.claude/skills/cookbook-add-model/templates/benchmarks.jsx.tmpl

@@ -1,5 +1,5 @@
 // TEMPLATE — instantiate via the cookbook-add-model skill. NOT a live cookbook.
-// Copy to docs_new/src/snippets/configs/<hf-org>/<model-slug>-benchmarks.jsx and
+// Copy to docs/src/snippets/configs/<hf-org>/<model-slug>-benchmarks.jsx and
 // fill measured numbers — OR delete this file entirely if you have none yet (the
 // MDX simply omits the `benchmarks` import/prop).
 //